fix: lowcode component leaf dont have export prop, exec leaf.export make error

liujuping · LeoYuan · commit 9d51dcdae388 · 2022-05-11T14:09:16.000+08:00
diff --git a/packages/renderer-core/src/hoc/leaf.tsx b/packages/renderer-core/src/hoc/leaf.tsx
@@ -238,7 +238,7 @@ export function leafWrapper(Comp: types.IBaseRenderComponent, {
       const {
         hidden = false,
         condition = true,
-      } = this.leaf?.export(TransformStage.Render) || {};
+      } = this.leaf?.export?.(TransformStage.Render) || {};
       return {
         nodeChildren: null,
         childrenInState: false,
